HIGH FREQUENCY AMPLIFIER

PROBLEM TO BE SOLVED: To provide a high frequency amplifier of which the gain adjustment range is wide.SOLUTION: The high frequency amplifier comprises: an input terminal 110 that receives a high frequency signal of an UHF frequency band; an amplification part 140 that amplifies the high frequency signal received by the input terminal; a switch part 130; an adjustment part 150; and an output terminal 170. The amplification part has different three amplification factors, and the three amplification factors can be switched by the switch part. The adjustment part is capable of further finely adjusting the amplification factor of the signal that is amplified by the amplification part. The output terminal outputs the signal that is adjusted by the adjustment part, to external equipment.SELECTED DRAWING: Figure 1 【課題】利得調整範囲の広い高周波増幅器を提供する。【解決手段】高周波増幅器は、ＵＨＦ周波数帯の高周波信号を受ける入力端子１１０と、入力端子で受けた高周波信号を増幅する増幅部１４０と、切換部１３０と、調整部１５０と、出力端子１７０とを備える。増幅部は異なる３つの増幅率を有し、切換部によって当該３つの増幅率を切換えることが可能である。調整部は、増幅部によって増幅された信号の増幅率をさらに微調整することができる。出力端子は、調整部によって調整された信号を外部機器へと出力する。【選択図】図１